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Block distinction Operation of diagnosis function
Check
code
Block
Check
code
Cause of operation
Air
conditioner
status
Display flashing
error
Compressor drive output error. All OFF Flashes after 1. Check installation conditions such as
(Relation of voltage, current error is detected packed valve opening, refrigerant
and frequency is abnormal) 4 times*. amount and power supply (rate +
10%,
Overloading operation of both of operation and non operation
compressor caused by condition).
over-charge refrigerant, 2. Check P.M.V. by measure the
P.M.V. failure, etc. resistance of the coil and confirm its
Compressor failure (High operation (sound of initial
current). operation, etc.)
3. Observe any possibility cause which
may affect operation load of
compressor.
4. Operate again. If compressor
operation is failure when 20 seconds
passed (count time from operation
starting of compressor), replace
compressor.
* 4 times ; When first error is detected, error is count as 1 time, then once operation is stop and re-started.
After re-starting operation within 6 minutes, if same error is detected, error count is add (count become 2 times)
When error count comes 4 times, record error to check code. But after re-starting operation, if no error is
detected and air conditioner can operate more than 6 minutes, error count is cleared.
The others Return signal of the outdoor Indoor unit Flashes when 1. Check power supply (Rate +
10%)
(including unit has been sent when operates error is detected. 2. If the air conditioner repeat operates
compressor) operation start. But after continue. Flashing stop and stop with interval of approx. 10
that, signal is stop some time. Outdoor unit and outdoor unit to 40 minutes.
Instantaneous power stop. start to operate Check protector (hardware) such
failure. when the return as Hi-Pressure switch,
Some protector signal from the Thermal-Relay, etc.
(hardware) of the outdoor unit is Check refrigerant amount, packed
outdoor unit open normal. valve opening and any possibility
circuit of signal. cause which may affect high
Signal circuit of indoor temperature or high pressure.
P.C. board or outdoor 3. Check operation signal of the indoor
P.C. board is failure unit by using diode. Measure voltage
in some period. at terminal block of the indoor unit
between No.2 and No.3 (or L2 and S)
If signal is varied 15-60V continuously,
replace inverter P.C. board.
If signal is not varied, replace indoor
P.C. board.
Action and Judgment
FILE NO. SVM-10020
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